Download or read book Timing Jitter in Ultra wideband UWB Systems written by Uzoma Anaso Onunkwo and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Timing offsets result from the use of real clocks that are non-ideal in sampling intervals. These offsets also known as timing jitter were shown to degrade the performance of the two forms of UWB systems impulse radio and orthogonal frequency division multiplexing (OFDM)-based UWB. It was shown that for impulse radio, timing jitter distorts the correlation property of the transmitted signal and the resulting performance loss is proportional to the root-mean-square (RMS) value of the timing jitter. For the OFDM-based UWB, timing jitter introduced inter-channel interference (ICI) and the performance loss was dependent on the product of the bandwidth and the RMS of the timing jitter. A number of techniques were proposed for mitigating the performance degradation in each form of UWB. Specifically, for impulse radio, the methods of pulse shaping and sample averaging were provided, whereas for OFDM-based UWB, oversampling and adaptive modulation were given. Through analysis and simulation, it was shown that substantial gain in signal power-to-noise ratio can be achieved using these jitter-reduction methods.

Download or read book Signaling Design in Ultra Wideband Wireless Communication Systems written by Chin-Sean Sum and published by LAP Lambert Academic Publishing. This book was released on 2012-04 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the study on signaling design in ultra-wideband (UWB) system wireless communication systems. UWB signaling design can be effectively manipulated for the purposes of performance improvement and interference mitigation. Timing jitter, as a critical issue in UWB signaling design, is also investigated to assess its impact to system performance. Chapter 1 describes the research background, and the motivation that becomes the catalyst to the completion of this study. Chapter 2 provides an overall introduction to UWB systems, with specific emphasis on direct sequence (DS) and DS multiband (MB) approaches. Chapter 3 deals with signaling design in varying low chip duty factor (DF), a unique parameter in UWB system. Chapter 4 proposes two interference mitigation techniques developed by manipulating signaling design in DS and DS-MB UWB system. Chapter 5 highlights and mitigates the impact of timing jitter in UWB signaling design.

Download or read book Understanding Ultra Wide Band Radio Fundamentals written by Maria-Gabriella Di Benedetto and published by Pearson Education. This book was released on 2004-06-17 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combines the theory and practical - with simulation tools for the understanding and design of Ultra Wide Band (UWB) communication networks. UWB is a revolutionary technology - recently receiving FCC approval. The UWB standard has several advantages including high transmission rates and the ability to carry signals while accounting for solid matter interference. Provides a theoretical analysis of the fundamentals of UWB radio communications supported by practical examples developed using computer simulations using MATLAB. UWB devices can be used for a variety of communications applications involving the transmission of very high data rates over short distances without suffering the effects of multi-path interference. UWB communication devices could be used to wirelessly distribute services such as phone, cable, and computer networking throughout a building or home. These devices could also be utilized by police, fire, and rescue personnel to provide covert, secure communications devices. The book presents the theoretical analysis of fundamental principles of Ultra Wide Band (UWB) radio communications supported by practical examples developed using computer simulation. The simulation codes are provided in the form of user-customizable MATLAB) functions which are included in the book. The examples are inserted within the theoretical treatise in order to help and guide the reader in the understanding of analytical principles. The book covers issues related to both UWB signal transmission and UWB network organization. In particular, the topics covered by the book are: principles of UWB radio transmission and modulation (PPM, PAM and DS-UWB for Impulse Radio, OFDM for the multi-band approach), UWB channel modeling, receiver structures, Multi User Interference modeling, Localization, Network organization: advanced Medium Access Control and routing design strategies.

Download or read book Ultra wideband RF System Engineering written by Thomas Zwick and published by Cambridge University Press. This book was released on 2013-10-03 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive summary of the state of the art in Ultra Wideband system engineering, from components to system engineering aspects.

Download or read book Ultra Wideband Short Pulse Electromagnetics 9 written by Frank Sabath and published by Springer Science & Business Media. This book was released on 2010-06-17 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra-wideband (UWB), short-pulse (SP) electromagnetics are now being used for an increasingly wide variety of applications, including collision avoidance radar, concealed object detection, and communications. Notable progress in UWB and SP technologies has been achieved by investigations of their theoretical bases and improvements in solid-state manufacturing, computers, and digitizers. UWB radar systems are also being used for mine clearing, oil pipeline inspections, archeology, geology, and electronic effects testing. Ultra-wideband Short-Pulse Electromagnetics 9 presents selected papers of deep technical content and high scientific quality from the UWB-SP9 Conference, which was held from July 21-25, 2008, in Lausanne, Switzerland. The wide-ranging coverage includes contributions on electromagnetic theory, time-domain computational techniques, modeling techniques, antennas, pulsed-power, UWB interactions, radar systems, UWB communications, broadband systems and components. This book serves as a state-of-the-art reference for scientists and engineers working in these applications areas.

Download or read book Interference Mitigation Techniques for Ultra wideband Systems written by Joe Izu Jamp and published by . This book was released on 2007 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt: For UWB OFDM based systems, LABI is again applied to code the data in the vicinity of a notch created by nulling out subcarriers. In-band notches of -28dB can be created, and is an improvement of 20dB over an uncoded spectrum.

Download or read book Ultra Wideband Wireless Communication written by Huseyin Arslan and published by John Wiley & Sons. This book was released on 2006-10-06 with total page 523 pages. Available in PDF, EPUB and Kindle. Book excerpt: ULTRA WIDEBAND WIRELESS COMMUNICATION AN INTERNATIONAL PANEL OF EXPERTS PROVIDE MAJOR RESEARCH ISSUES AND A SELF-CONTAINED, RAPID INTRODUCTION TO THE THEORY AND APPLICATION OF UWB This book delivers end-to-end coverage of recent advances in both the theory and practical design of ultra wideband (UWB) communication networks. Contributions offer a worldwide perspective on new and emerging applications, including WPAN, sensor and ad hoc networks, wireless telemetry, and telemedicine. The book explores issues related to the physical layer, medium access layer, and networking layer. Following an introductory chapter, the book explores three core areas: Analysis of physical layer and technology issues System design elements, including channel modeling, coexistence, and interference mitigation and control Review of MAC and network layer issues, up to the application Case studies present examples such as network and transceiver design, assisting the reader in understanding the application of theory to real-world tasks. Ultra Wideband Wireless Communication enables technical professionals, graduate students, engineers, scientists, and academic and professional researchers in mobile and wireless communications to become conversant with the latest theory and applications by offering a survey of all important topics in the field. It also serves as an advanced mathematical treatise; however, the book is organized to allow non-technical readers to bypass the mathematical treatments and still gain an excellent understanding of both theory and practice.

Download or read book Synchronization and DE Modulation for Ultra wideband Access written by Xiliang Luo and published by . This book was released on 2006 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra Wideband Systems with MIMO written by Thomas Kaiser and published by John Wiley & Sons. This book was released on 2010-03-18 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date coverage of the cutting-edge research on UWB Systems with Multiple Antennas In this book, the authors investigate the benefits of combining UWB and MIMO technologies; highlighting five aspects of this promising research field: channel capacity, space-time coding, beamforming and localization, time-reversal transmission, and UWB-MIMO relay. The book presents a systematic and in-depth discussion for each of the hot topics, providing an insight into the cutting-edge research currently undertaken. It is expected that the ideas and approaches illustrated in this book will inspire sparks for the emerging technologies in short-range high data-rate wireless communications and other related applications. Key Features: Provides a thorough coverage combining the UWB and MIMO, outlining the opportunities and benefits created by the combination of these technologies Highlights five aspects of this promising research field: channel capacity, space-time coding, beamforming and localization, time-reversal transmission, and UWB-MIMO relay Covers UWB-MIMO channel measurement and models This book will serve as an invaluable reference for academic and professional researchers in wireless communications, and graduate students. Engineers and technical professionals will also find the book insightful

Download or read book Ultra wideband Positioning Systems written by Zafer Sahinoglu and published by Cambridge University Press. This book was released on 2008-09-04 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Position estimation of wireless devices has many applications in short-range networks. Ultra-wideband (UWB) signals provide accurate positioning capabilities that can be harnessed in wireless systems to realise these applications. This text provides detailed coverage of UWB positioning systems, offering comprehensive treatment of signal and receiver design for ranging, range estimation techniques, theoretical performance bounds, ranging algorithms and protocols. Beginning with a discussion of the potential applications of wireless positioning, and investigating UWB signals for such applications, later chapters establish a signal processing framework for analysing UWB positioning and ranging systems. The recent IEEE 802.15.4a standard related to UWB is also studied in detail. Each chapter contains examples, problems and Matlab scripts to help readers grasp key concepts. This is an ideal text for graduate students and researchers in electrical and computer engineering, and practitioners in the communications industry, particularly those in wireless communications. Further resources are available at www.cambridge.org/9780521873093.

Download or read book Ultrawideband Short Pulse Radio Systems written by Vladimir I. Koshelev and published by Artech House. This book was released on 2017-04-30 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: This resource provides a comprehensive treatment of the methods, analysis, and practice of impulse and ultrawideband (UWB) systems. Sources, antennas, propagation, electromagnetic theory, and actual practical systems are explored.This book provides novel perspective on impulse and short-pulse wireless engineering along with practical guidance on how to build antennas and radio hardware for high-power impulse signals. Theoretical and experimental results in the time-frequency domain are presented. The book explains and discusses the scattering of UWB electromagnetic pulses by conducting and dielectric objects. Impulse responses of objects and propagation channels are explored with details of signal models and their spectral characteristics and uses of regularization of a Kramers-Kroning type relation for estimating transfer functions. Readers gain insight into the development of high-power sources of UWB radiation with megavolt effective potential on the base of combined antenna arrays excited with bipolar voltage pulses. This in-depth volume includes chapters on receiving antennas, transmitting antennas, and antenna arrays along with details on high-power UWB radiation sources as well as problem sets.

Download or read book Rapid Synchronization of Ultra Wideband Transmitted Reference Receivers written by F. Dowla and published by . This book was released on 2004 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Time synchronization is a major challenge and a rich area of study in ultra-wideband (UWB) communication systems. Transmitted-reference (TR) receivers avoid the stringent synchronization requirements that exist in conventional pulse detection schemes. However, the performance of such receivers is highly sensitive to precise timing acquisition and tracking of integration window that defines the limits of the finite integrator prior to final decision block. In this paper we propose a novel rapid synchronization technique that allows us to extract the timing information very accurately in UWB-TR receivers in the presence of a variety of channel noise and interference. The principles of the method are presented and the BER performance of a synchronized UWB-TR receiver is investigated in the presence of a range of values for timing jitter by computer simulations. Our studies show that the proposed synchronization technique greatly improves the performance of UWB-TR receivers in the presence of jitter and AWGN with modest increase in complexity.

Download or read book Transmitted reference Methods in Ultra wideband Communications written by Faranak Nekoogar and published by . This book was released on 2005 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ultra Wideband Antennas and Propagation written by Ben Allen and published by John Wiley & Sons. This book was released on 2006-11-02 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing up-to-date material for UWB antennas and propagation as used in a wide variety of applications, "Ultra-wideband Antennas and Propagation for Communications, Radar and Imaging" includes fundamental theory, practical design information and extensive discussion of UWB applications from biomedical imaging, through to radar and wireless communications. An in-depth treatment of ultra-wideband signals in practical environments is given, including interference, coexistence and diversity considerations. The text includes antennas and propagation in biological media in addition to more conventional environments. The topics covered are approached with the aim of helping practising engineers to view the subject from a different angle, and to consider items as variables that were treated as constants in narrowband and wideband systems. Features tables of propagation data, photographs of antenna systems and graphs of results (e.g. radiation patterns, propagation characteristics) Covers the fundamentals of antennas and propagation, as well as offering an in-depth treatment of antenna elements and arrays for UWB systems, and UWB propagation models Provides a description of the underlying concepts for the design of antennas and arrays for conventional as well as ultra-wideband systems Draws together UWB theory by using case-studies to show applications of antennas and propagation in communication, radar and imaging systems The book highlights the unique design issues of using ultra-wideband and will serve both as an introductory text and a reference guide for designers and students alike.

Download or read book Reliable Communications for Short Range Wireless Systems written by Ismail Guvenc and published by Cambridge University Press. This book was released on 2011-03-24 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ensuring reliable communication is an important concern in short-range wireless communication systems with stringent quality of service requirements. Key characteristics of these systems, including data rate, communication range, channel profiles, network topologies and power efficiency, are very different from those in long-range systems. This comprehensive book classifies short-range wireless technologies as high and low data rate systems. It addresses major factors affecting reliability at different layers of the protocol stack, detailing the best ways to enhance the capacity and performance of short-range wireless systems. Particular emphasis is placed on reliable channel estimation, state-of-the-art interference mitigation techniques and cooperative communications for improved reliability. The book also provides detailed coverage of related international standards including UWB, ZigBee, and 60 GHz communications. With a balanced treatment of theoretical and practical aspects of short-range wireless communications and with a focus on reliability, this is an ideal resource for practitioners and researchers in wireless communications.

Download or read book Excursions in Harmonic Analysis Volume 4 written by Radu Balan and published by Birkhäuser. This book was released on 2015-10-20 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume consists of contributions spanning a wide spectrum of harmonic analysis and its applications written by speakers at the February Fourier Talks from 2002 – 2013. Containing cutting-edge results by an impressive array of mathematicians, engineers and scientists in academia, industry and government, it will be an excellent reference for graduate students, researchers and professionals in pure and applied mathematics, physics and engineering. Topics covered include: Special Topics in Harmonic Analysis Applications and Algorithms in the Physical Sciences Gabor Theory RADAR and Communications: Design, Theory, and Applications The February Fourier Talks are held annually at the Norbert Wiener Center for Harmonic Analysis and Applications. Located at the University of Maryland, College Park, the Norbert Wiener Center provides a state-of- the-art research venue for the broad emerging area of mathematical engineering.

Download or read book Embedded Software and Systems written by Yann-Hang Lee and published by Springer. This book was released on 2007-06-30 with total page 845 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the Third International Conference on Embedded Software and Systems, ICESS 2007, held in Daegu, Korea, May 2007. The 75 revised full papers cover embedded architecture, embedded hardware, embedded software, HW-SW co-design and SoC, multimedia and HCI, pervasive/ubiquitous computing and sensor network, power-aware computing, real-time systems, security and dependability, and wireless communication.